Temperature converter
Convert temperatures between Celsius, Fahrenheit, Kelvin, and more
Temperature converter
Degrees temperature conversions for Kelvin, Celsius, Fahrenheit, Rankine, Delisle, Newton, Réaumur, and Rømer.
TL;DR
What is Temperature converter?
Temperature conversion translates a value between scales used in different contexts: Celsius for everyday and scientific use in most of the world, Fahrenheit primarily in the United States, Kelvin for scientific and thermodynamic calculations, and Rankine in some engineering fields.
Common use cases
- ‣Scientific computing: Kelvin is required for thermodynamic equations; convert from Celsius before applying formulas
- ‣Internationalization: display temperatures in Fahrenheit for US users and Celsius for others
- ‣Hardware specs: CPU and GPU thermal limits are often listed in Celsius; convert to understand the equivalent in your preferred scale
Frequently asked questions
Why is Kelvin used in science instead of Celsius?
Kelvin is an absolute temperature scale: 0 K is absolute zero, the point at which all thermal motion stops. Celsius 0 is the freezing point of water, an arbitrary reference. Many physical laws (ideal gas law, Planck's law) require an absolute scale, making Kelvin necessary for accurate calculations.
What is the formula for Celsius to Fahrenheit?
F = (C × 9/5) + 32. For example, 100°C = 212°F. The inverse is C = (F - 32) × 5/9. A quick mental approximation: double the Celsius value and add 30 (accurate within a few degrees for everyday temperatures).